Samsung LCD TV Black Screen (Weird!)

[tom66]

Re: Samsung LCD TV Black Screen (Weird!)

One thing I couldn't help but notice from your pictures was the "bodge" you did for two of the caps. Those caps look MUCH bigger than I'd expect for a typical SMPS cap. What series of capacitor did you use? (e.g. Panasonic FM) You must use low-ESR high reliability capacitors for an application like this; general purpose ones will not suffice (either they will not work at all or you will open the TV up in another 12 months to replace them.)

[selldoor]

Re: Samsung LCD TV Black Screen (Weird!)

I think perhaps that the problem lies here in the three HDMI ports IC units at the back. Is there anyway, where I can disable one of the port and make the system proceed? I was thinking about removing the chip and making a bridge connection where the chip was just to start up the TV? Or maybe transfer the chip to one of the others ports by bridging?

Wow! a picture I can actually read the board numbers on. I did try and look at the off site ones but when it said 1hr plus to download I gave up.
Normally we would get you to measure/test components and voltages on connectors. If you want to proceed with this I think you will have to get a multimeter - even a cheapo one off ebay would help.

[HerculesDK]

Re: Samsung LCD TV Black Screen (Weird!)

One thing I couldn't help but notice from your pictures was the "bodge" you did for two of the caps. Those caps look MUCH bigger than I'd expect for a typical SMPS cap. What series of capacitor did you use? (e.g. Panasonic FM) You must use low-ESR high reliability capacitors for an application like this; general purpose ones will not suffice (either they will not work at all or you will open the TV up in another 12 months to replace them.)

I still have the original ones. These were just some that I bought that I installed for the time being. I will install them in a better way once I get the TV running again.

[HerculesDK]

Re: Samsung LCD TV Black Screen (Weird!)

Wow! a picture I can actually read the board numbers on. I did try and look at the off site ones but when it said 1hr plus to download I gave up.
Normally we would get you to measure/test components and voltages on connectors. If you want to proceed with this I think you will have to get a multimeter - even a cheapo one off ebay would help.

I looked at one today that I could buy for 300 DKR new that is, but I dont know what I would use it for after this? What parts do you want me to check? I could perhaps take it over to an electrian and he could test those parts for me?

[selldoor]

Re: Samsung LCD TV Black Screen (Weird!)

I still have the original ones. These were just some that I bought that I installed for the time being. I will install them in a better way once I get the TV running again.

Looking at the originals I dont see how the ones you have used will be as good. Please tell us what the originals were and what the new ones are.
Could be you would be better to replace the old ones

[selldoor]

Re: Samsung LCD TV Black Screen (Weird!)

I looked at one today that I could buy for 300 DKR new that is, but I dont know what I would use it for after this? What parts do you want me to check? I could perhaps take it over to an electrian and he could test those parts for me?

I was thinking of something more like this, for a one off job.

http://viewitem.eim.ebay.dk/Digital-...901495925/item

Says its from the uk but probably from china - can tell how long it takes
dont speak Danish

[HerculesDK]

Re: Samsung LCD TV Black Screen (Weird!)

Looking at the originals I dont see how the ones you have used will be as good. Please tell us what the originals were and what the new ones are.
Could be you would be better to replace the old ones

The voltage and every thing was the same on both. I bought these at one of the best electronic stores in Denmark, which is speciel shop for "experts" and others. There is not any brand on the new ones, but the man at the shop told me that these were high quality components thats why they were so expensive. But I still have the original ones, which are working.

The old ones just says KXJ 105C 450v 68uf

The new ones has the same specs, but says HP.

[HerculesDK]

Re: Samsung LCD TV Black Screen (Weird!)

I was thinking of something more like this, for a one off job.

http://viewitem.eim.ebay.dk/Digital-...901495925/item

Says its from the uk but probably from china - can tell how long it takes
dont speak Danish

Ok that is cheap, but its from UK? Postage is probably expensive.

I found some on sale in the shop where I bought my stuff:

https://www.elextra.dk/main.aspx?pag...e&artno=H33451

https://www.elextra.dk/main.aspx?pag...e&artno=H10671

[HerculesDK]

Re: Samsung LCD TV Black Screen (Weird!)

Any help?

[selldoor]

Re: Samsung LCD TV Black Screen (Weird!)

Must have missed that post! Yes I cant believe postage is that much sorry.
You can get them straight from HK post free but it will be a long wait
http://viewitem.eim.ebay.dk/Digital-...691603492/item.

I dont know anything about the two you suggest but I would go for the DVm231 same price? and more functions? - Odd as you would expect
840 to be a later version and better.

[HerculesDK]

Re: Samsung LCD TV Black Screen (Weird!)

Must have missed that post! Yes I cant believe postage is that much sorry.
You can get them straight from HK post free but it will be a long wait
http://viewitem.eim.ebay.dk/Digital-...691603492/item.

I dont know anything about the two you suggest but I would go for the DVm231 same price? and more functions? - Odd as you would expect
840 to be a later version and better.

Ok, but what do you want me to check with these instruments? I mean which components and such?